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       1                 :             : /* Utilities for querying and manipulating type trees.
       2                 :             :    Copyright (C) 2013-2024 Free Software Foundation, Inc.
       3                 :             : 
       4                 :             : This file is part of GCC.
       5                 :             : 
       6                 :             : GCC is free software; you can redistribute it and/or modify
       7                 :             : it under the terms of the GNU General Public License as published by
       8                 :             : the Free Software Foundation; either version 3, or (at your option)
       9                 :             : any later version.
      10                 :             : 
      11                 :             : GCC is distributed in the hope that it will be useful,
      12                 :             : but WITHOUT ANY WARRANTY; without even the implied warranty of
      13                 :             : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      14                 :             : GNU General Public License for more details.
      15                 :             : 
      16                 :             : You should have received a copy of the GNU General Public License
      17                 :             : along with GCC; see the file COPYING3.  If not see
      18                 :             : <http://www.gnu.org/licenses/>.  */
      19                 :             : 
      20                 :             : #ifndef GCC_CP_TYPE_UTILS_H
      21                 :             : #define GCC_CP_TYPE_UTILS_H
      22                 :             : 
      23                 :             : /* Returns the first tree within T that is directly matched by PRED.  T may be a
      24                 :             :    type or PARM_DECL and is incrementally decomposed toward its type-specifier
      25                 :             :    until a match is found.  NULL is returned if PRED does not match any
      26                 :             :    part of T.
      27                 :             : 
      28                 :             :    This is primarily intended for detecting whether T uses `auto' or a concept
      29                 :             :    identifier.  Since either of these can only appear as a type-specifier for
      30                 :             :    the declaration in question, only top-level qualifications are traversed;
      31                 :             :    find_type_usage does not look through the whole type.  */
      32                 :             : 
      33                 :             : inline tree
      34                 :  2856089166 : find_type_usage (tree t, bool (*pred) (const_tree))
      35                 :             : {
      36                 :  3541510235 :   if (pred (t))
      37                 :             :     return t;
      38                 :             : 
      39                 :  3498001205 :   enum tree_code code = TREE_CODE (t);
      40                 :             : 
      41                 :  3498001205 :   if (code == POINTER_TYPE || code == REFERENCE_TYPE
      42                 :  3498001205 :       || code == PARM_DECL || code == OFFSET_TYPE
      43                 :             :       || code == FUNCTION_TYPE || code == METHOD_TYPE
      44                 :             :       || code == ARRAY_TYPE)
      45                 :   683533003 :     return find_type_usage (TREE_TYPE (t), pred);
      46                 :             : 
      47                 :   515827207 :   if (TYPE_PTRMEMFUNC_P (t))
      48                 :     1888066 :     return find_type_usage
      49                 :     1888066 :       (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (t)), pred);
      50                 :             : 
      51                 :             :   return NULL_TREE;
      52                 :             : }
      53                 :             : 
      54                 :             : #endif // GCC_CP_TYPE_UTILS_H